CA2322514A1 - Structure with magnetic properties - Google Patents

Structure with magnetic properties Download PDF

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Publication number
CA2322514A1
CA2322514A1 CA002322514A CA2322514A CA2322514A1 CA 2322514 A1 CA2322514 A1 CA 2322514A1 CA 002322514 A CA002322514 A CA 002322514A CA 2322514 A CA2322514 A CA 2322514A CA 2322514 A1 CA2322514 A1 CA 2322514A1
Authority
CA
Canada
Prior art keywords
magnetic properties
electrical current
electromagnetic radiation
magnetic
radiation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002322514A
Other languages
French (fr)
Other versions
CA2322514C (en
Inventor
Anthony James Holden
David James Robbins
William James Stewart
Michael Charles Keogh Wiltshire
John Brian Pendry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson AB
Original Assignee
Marconi Caswell Limited
Anthony James Holden
David James Robbins
William James Stewart
Michael Charles Keogh Wiltshire
John Brian Pendry
Marconi Optical Components Ltd
Marconi Uk Intellectual Property Ltd
Ericsson Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marconi Caswell Limited, Anthony James Holden, David James Robbins, William James Stewart, Michael Charles Keogh Wiltshire, John Brian Pendry, Marconi Optical Components Ltd, Marconi Uk Intellectual Property Ltd, Ericsson Ab filed Critical Marconi Caswell Limited
Publication of CA2322514A1 publication Critical patent/CA2322514A1/en
Application granted granted Critical
Publication of CA2322514C publication Critical patent/CA2322514C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12542—More than one such component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12556—Organic component
    • Y10T428/12569—Synthetic resin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component

Abstract

A structure (2) which exhibits magnetic properties when it receives electromagnetic radiation (20) is formed from an array of capacitive elements (4) each of which is smaller, and preferably much smaller, than the wavelength of the radiation.
Each capacitive element (4) has a low resistance conducting path associated with it and is such that a magnetic component of the received electromagnetic radiation (20) induces an electrical current to flow around said path and through the associated element. The creation of internal magnetic fields generated by the flow of the induced electrical current gives rise to the structure's magnetic properties.
CA002322514A 1999-01-04 1999-12-23 Structure with magnetic properties Expired - Fee Related CA2322514C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9900034.1A GB9900034D0 (en) 1999-01-04 1999-01-04 Structure with magnetic properties
GB9900034.1 1999-01-04
PCT/GB1999/004419 WO2000041270A1 (en) 1999-01-04 1999-12-23 Structure with magnetic properties

Publications (2)

Publication Number Publication Date
CA2322514A1 true CA2322514A1 (en) 2000-07-13
CA2322514C CA2322514C (en) 2009-08-18

Family

ID=10845496

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002322514A Expired - Fee Related CA2322514C (en) 1999-01-04 1999-12-23 Structure with magnetic properties

Country Status (7)

Country Link
US (1) US6608811B1 (en)
EP (1) EP1647074A1 (en)
JP (1) JP4162859B2 (en)
AU (1) AU767300B2 (en)
CA (1) CA2322514C (en)
GB (2) GB9900034D0 (en)
WO (1) WO2000041270A1 (en)

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GB2360094A (en) 2000-03-06 2001-09-12 Marconi Caswell Ltd RF screens for MRI
GB2360093A (en) * 2000-03-06 2001-09-12 Marconi Caswell Ltd NMR system with magnetic flux guide
GB2360132B (en) * 2000-03-06 2002-04-24 Marconi Caswell Ltd Structure with switchable magnetic properties
GB2360138A (en) * 2000-03-06 2001-09-12 Marconi Caswell Ltd Screens for RF magnetic flux
GB2360137A (en) * 2000-03-06 2001-09-12 Marconi Caswell Ltd Guides for RF magnetic flux
GB2363845A (en) 2000-06-21 2002-01-09 Marconi Caswell Ltd Focussing RF flux
AU762267B2 (en) * 2000-10-04 2003-06-19 E-Tenna Corporation Multi-resonant, high-impedance surfaces containing loaded-loop frequency selective surfaces
US6512494B1 (en) 2000-10-04 2003-01-28 E-Tenna Corporation Multi-resonant, high-impedance electromagnetic surfaces
GB2373102A (en) * 2001-03-06 2002-09-11 Marconi Caswell Ltd Structures with magnetic properties
WO2002103846A1 (en) 2001-06-15 2002-12-27 E-Tenna Corporation Aperture antenna having a high-impedance backing
GB2380860A (en) * 2001-10-08 2003-04-16 Marconi Caswell Ltd Structures with magnetic properties
GB0127514D0 (en) * 2001-11-16 2002-01-09 Marconi Optical Components Ltd Imaging device
GB2387031A (en) * 2002-03-28 2003-10-01 Marconi Corp Plc Mobile communication apparatus
US7794629B2 (en) 2003-11-25 2010-09-14 Qinetiq Limited Composite materials
CN100349059C (en) * 2004-03-16 2007-11-14 西北工业大学 Tunable sheet-like microwave negative magnetic conductive material
CN1332261C (en) * 2004-04-22 2007-08-15 西北工业大学 Tunable microwave left-hand material
CN1323323C (en) * 2004-04-22 2007-06-27 西北工业大学 Microwave left-hand material regulated by planar defect
CN1321349C (en) * 2004-04-22 2007-06-13 西北工业大学 Tunable laminar microwave left-hand material
US7135917B2 (en) * 2004-06-03 2006-11-14 Wisconsin Alumni Research Foundation Left-handed nonlinear transmission line media
US7205941B2 (en) * 2004-08-30 2007-04-17 Hewlett-Packard Development Company, L.P. Composite material with powered resonant cells
WO2006078658A1 (en) * 2005-01-18 2006-07-27 Dow Global Technologies Inc. Structures useful in creating composite left-hand-rule media
JP3928055B2 (en) * 2005-03-02 2007-06-13 国立大学法人山口大学 Negative permeability or negative permittivity metamaterial and surface wave waveguide
US20060263512A1 (en) * 2005-05-19 2006-11-23 Glocker David A Multi-layer coating system and method
WO2006137575A1 (en) * 2005-06-24 2006-12-28 National University Corporation Yamaguchi University Strip line type right-hand/left-hand system composite line or left-hand system line and antenna using the same
US9677856B2 (en) * 2006-07-25 2017-06-13 Imperial Innovations Limited Electromagnetic cloaking method
EP2097763B1 (en) * 2006-12-22 2014-02-26 Koninklijke Philips N.V. Rf coil for use in an mr imaging system, in combination with a metamaterial
US7990328B2 (en) * 2007-03-29 2011-08-02 The Board Of Regents, The University Of Texas System Conductor having two frequency-selective surfaces
MY152480A (en) * 2007-09-20 2014-10-15 Galtronics Corp Ltd Method of manufacturing a multi-layer conductive tube antenna
WO2010026907A1 (en) * 2008-09-03 2010-03-11 株式会社村田製作所 Metamaterial
US8315500B2 (en) * 2008-10-03 2012-11-20 Hewlett-Packard Development Company, L.P. Metamaterial inclusion structure and method
US8194302B2 (en) * 2009-12-15 2012-06-05 Hewlett-Packard Development Company, L.P. Active chiral photonic metamaterial
US8677880B2 (en) 2010-04-08 2014-03-25 22 Evolution Llc Combination stackable magazine cores and outer binding skins for changing style and capacity versability of a firearm and further including dual use follower
US8387296B2 (en) 2010-04-08 2013-03-05 22 Evolution Llc Drop bolt hold open actuator for use with AR-15/M16 type firearms and incorporating a modified and displaceable follower for engaging a bolt catch mechanism such as in conjunction with rimfire ammunition
US9091499B2 (en) 2010-04-08 2015-07-28 22 Evolution Llc Bolt hold open actuator for use with AR-15/M16 type firearms
US8479635B2 (en) 2010-04-08 2013-07-09 22 Evolution Llc Drop bolt hold open actuator for use with AR-15/M16 type firearms in conjunction with rimfire ammunition
US8631749B2 (en) 2011-01-04 2014-01-21 Precision Planting Llc Seed tube egress-mounted seed sensor
JP2012175522A (en) * 2011-02-23 2012-09-10 Handotai Rikougaku Kenkyu Center:Kk Metamaterial
CN102903397B (en) 2011-07-29 2015-07-22 深圳光启高等理工研究院 Artificial broadband absorbing electromagnetic material
US20150355297A1 (en) * 2013-01-11 2015-12-10 Ravi Menon System and method for decoupling magentic resonance imaging radio frequency coils with a modular magnetic wall

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Also Published As

Publication number Publication date
GB9900034D0 (en) 1999-02-24
US6608811B1 (en) 2003-08-19
CA2322514C (en) 2009-08-18
JP4162859B2 (en) 2008-10-08
WO2000041270A1 (en) 2000-07-13
JP2002534883A (en) 2002-10-15
AU767300B2 (en) 2003-11-06
AU1988500A (en) 2000-07-24
GB9930537D0 (en) 2000-02-16
EP1647074A1 (en) 2006-04-19
GB2346485A (en) 2000-08-09
GB2346485B (en) 2001-03-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20151223